package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author: HuangQi
 * @date: Created in 11:22 2023/9/6
 * @description: 分类业务层实现类
 */
@Service
@Slf4j
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {


    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;


    /**
     * 根据id删除分类,删除之前需要进行判断
     *
     * @param id
     */
    @Override
    public void remove(Long id) {
        //查询当前分类是否关联了菜品,关联,抛出一个业务异常
        LambdaQueryWrapper<Dish> dishQueryWrapper = new LambdaQueryWrapper();
        dishQueryWrapper.eq(Dish::getCategoryId, id);
        int countDish = dishService.count(dishQueryWrapper);


        if (countDish > 0) {
            throw new CustomException("当前分类关联了菜品,不能删除");
        }

        //查询当前分类是否关联了套餐,关联,抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealQueryWrapper = new LambdaQueryWrapper();
        setmealQueryWrapper.eq(Setmeal::getCategoryId, id);
        int countSetmeal = setmealService.count(setmealQueryWrapper);
        if (countSetmeal > 0) {
            throw new CustomException("当前分类关联了套餐,不能删除");
        }

        //无关联,删除分类
        super.removeById(id);

    }
}
